Morphological changes and reduction mechanism for the weak reduction of the preoxidized panzhihua ilmenite
文献类型：会议论文
| 作者 | Zhang, Jianbo1,2; Zhang, Gengyu1,2; Zhu, Qingshan1; Lei, Chao1,2; Xie, Zhaohui1; Li, Hongzhong1 |
| 出版日期 | 2014-06-01 |
| 关键词 | Morphology - Hematite - Titanium dioxide |
| 卷号 | 45 |
| 期号 | 3 |
| DOI | 10.1007/s11663-013-0018-3 |
| 页码 | 914-922 |
| 英文摘要 | Morphological changes and phase transition behaviors were investigated for the weak reduction (reduction of ferric iron-to-ferrous state) of preoxidized Panzhihua ilmenite by hydrogen at 873 K to 1073 K (600 掳C to 800 掳C). Ilmenite was preoxidized for 4 hours at 1023 K and 1173 K (750 掳C and 900 掳C), respectively, before the reduction. The results revealed that there were two competing reduction routes. At high reduction temperatures, e.g., 1023 K and 1073 K (750 掳C and 800 掳C), ferric irons from both hematite and pseudobrookite would combine with rutile grains as formed in the preoxidation to form homogeneous ilmenite phase with pores immingled. However, at lower reduction temperatures, e.g., 873 K (600 掳C), hematite and pseudobrookite are reduced mainly through direct reduction without the participation of rutile. As a result, the as-reduced ilmenites show great differences in their phase components and microstructure, especially for the Ti species. For ilmenites preoxidized at 1023 K (750 掳C), most of the Ti ions present in the needlelike rutile network, but for ilmenites preoxidized at 1173 K (900 掳C), Ti distributed in both irregular rutile grains and ilmenite matrix. 漏 2014 The Minerals, Metals & Materials Society and ASM International. |
| 项目编号 | The authors are grateful to financial support from the National Basic Research Program of China (Grant No. 2013CB632603) and from the National Natural Science Foundation of China (Grant No. 21325628). |
| 资助机构 | Springer Boston |
| 学科主题 | Ilmenite |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59350]  |
| 作者单位 | 1.State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Zhang, Jianbo,Zhang, Gengyu,Zhu, Qingshan,et al. Morphological changes and reduction mechanism for the weak reduction of the preoxidized panzhihua ilmenite[C]. 见:. |
入库方式： OAI收割
来源：过程工程研究所
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